Buff-wheel attachment for sewing-machines.



N0. 68!,783. Patented Sept. 3, I901. J. H. GREEN. BUFF WHEEL ATTACHMENTFOB SEWING MACHINES.

(Applicafion filed June 1a, 1961.

2 Sheets-Sheet I.

(No Model.)

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No. 68!,783. Patontad Sept 3, IBM.

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BUFF WHEEL ATTACRHENT FOR SEWING MACHINES.

(Applieation fllad Juno 18 1901.) (N0 Model.) 2 Sheets-Shaot 2.

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TTnn STATES PATENT OFFICE.

JOHN II. GREEN, OF SPRINGFIELD, ILLINOIS, ASSIGNOR OF ONE-HALF TOHERBERT HARRIS, OF SAME PLACE.

BUFF-WHEEL ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 681,783, datedSeptember 3, 1901.

Application filed June 13,1901.

To all whom it may concern:

Be it known that I, JOHN H. GREEN, a citizen of the United States,residing at Springfield, in the county of Sangamon and State ofIllinois, have invented certain new and useful Improvements inBuif-TVheel Attachments for Sewing-Machines, of which the following issuch a full, clear, and exact description as will enable others skilledin the art to which it appertains to make and use my said invention.

My invention relates to devices of that class which are used inconnection with the flywheels of sewing-machines or small lathes or thelike for operating buff-wheels or emcry-wheels.

The purposes of my invention are to provide a buff-wheel attachment soconstructed and arranged that it may be easily placed on the fly-wheelof the machine with which it is to be used and may be convenientlydetached therefrom and compactly folded, so as to 00- cupy the smallestpractical space.

The invention herein described is a modification and improvement of thatset forth in United States Letters Patent No. 669,633, granted to meMarch 12, 1901, for improvements in buff-wheel attachments.

My invention is shown in the annexed drawings, to which reference ishereby made, and in which similar reference-letters designate like partsin all of the views.

My invention is hereinafter fullydescribed and finally recited in theclaim.

Referring to the drawings, Figure 1 is a perspective view of thebuff-wheel attachment in connection with the fly-wheel of asewing-machine. Fig. 2 is an enlarged longitudinal axial section on theline 2 2 of Fig. 1. Fig. 3 is an enlarged side elevation of the devicewith the arms secured alongside of each other. Fig. 4 is a verticaltransverse section on the line 4: 4 of Fig. 3. Fig. 5 is an enlargedside elevation of one of the arms detached.

In the device described in my Patent No. 669,633 spring-arms areemployed to connect the mandrel-bolt with the fly-wheel of thesewing-machine. It has been found in practice that spring-arms areobjectionable be- Serial No. 64,421. (No model.)

cause of their liability to become distorted during the operation ofhardening, thereby producing inequalities in the arms which throw themandrel-bolt out of true and cause it to Wabble in turning, therebygreatly diminishing the effectiveness of the device. The arms hereindescribed are of such form and are connected with the mandrel-bolt insuch manner that all of the arms may be moved simultaneously anduniformly toward or away from the axis of the mandrel-bolt, therebyassuring perfect centering and true running of the device. A taperingmandrelboltA is screw-threaded and has a branching head A, having forksa,in which the arms B are mounted on pivots b. I preferably employ amandrel-bolt having a head with three branches supporting three radialarms, as shown; but a head with a greater number of branches and acorresponding number of arms may obviously be used. A nut D fits on thescrew-bolt A, and the forward end of the bolt engages with the curvededges 1) of the arms B, and as the nut is tightened the points of thearms are simultaneously and uniformly drawn toward each other. On theother hand, when the nut is unscrewed the arms may be readily adjustedto fit any flywheel within the scope of the swing of the arms. The formof the curved front ends 12 of the arms B is such that the arms eachhave two points of contact X with the perimeter of the fly-wheel, asclearly indicated by dotted lines in Fig. 5. The bottoms of the slots atin the branches at incline forwardly, and the slots are of such depththat when the arms are folded, as shown in Fig. 3, the inner edges ofthe arms will rest on the bottom of the slot at the front end of thebolt-head, so that when the nut D is screwed up against the curved endsof the arms the arms will be securely held in the position shown, thedevice then being in a form most convenient for transportation. Thejam-nut D serves to secure the nut D from turning. It may also serve tosecure an emery-wheel or a saw on the mandrel-bolt.

Having fully described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

engaging with the curved ends of said arms, as set forth.

In witness whereof I have hereunto subscribed my name, at Springfield,Illinois, this 7th day of May, 1901.

JOHN H. GREEN.

Witnesses:

S. R. POLLARD, HERBERT HARRIS. J

